docs: replace legacy line‑dot‑left‑horizontal icons with unified dot icon across docs

apps/docs/content/(01-linear-structures)/two-pointers/11-container-with-most-water.mdx

@@ -1,7 +1,7 @@
 ---
 title: '11. Container With Most Water'
 description: You are given an integer array height of length n. There are n vertical lines drawn such that the two endpoints of the i^th line are (i, 0) and (i, height[i])
-icon: line-dot-left-horizontal
+icon: dot
 sidebar:
   label: 'Container With Most Water'
   badge: 'Medium'